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Discussion :: Algebra Problems

  1.  If a, b are positive integers, define a * b = a where ab = a (modulo 7), with this * operation, then inverse of 3 in group G (1, 2, 3, 4, 5, 6) is

    2. A.

    1
    B.

    3
    C.

    5
    D.

    7

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    Answer : Option C

    Explanation :

    5

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